US 10,541,904 B2Granted

Establishing a network fault detection session

AssigneeHewlett Packard Enterprise Development LP

InventorsVenkatavaradhan Devarajan, Chivukula Koundinya, Gopinatha Rao P

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Abstract

Examples relate to establishing a network fault detection session. In one example, a routing device may receive a request to initiate a bidirectional forwarding detection (BFD) session with a second routing device; transmit a first echo frame to the second routing device; receive a first response frame; determine that a response time does not meet a response time threshold; in response to the determination, determine that a BFD failure threshold has not been met; after the determination that the BFD failure threshold has not been met, transmit a second echo frame to the second routing device; receive a second response frame; determine whether a second response time meets the BFD response time threshold; and in response to determining that the second response time meets the BFD response time threshold, provide a notification that a BFD session has been established between the routing device and the second routing device.

Claims8

Dependent claims

A network routing device for establishing a network fault detection session, the network routing device comprising:

a hardware processor;
and a data storage device storing instructions that, when executed by the hardware processor, cause the hardware processor to:
receive, from a requesting device, a request to initiate a bidirectional forwarding detection (BFD) session with a second network routing device different from the requesting device;
transmit a first BFD echo frame to the second network routing device;
receive, from the second network routing device, a first BFD response frame that corresponds to the first BFD echo frame;
perform a first determination to determine that a response time associated with the BFD response frame is not less than a BFD response time threshold;
in response to the first determination, perform a second determination to determine that either a time period since transmission of the first BFD echo frame or a total number of BFD echo frames with a corresponding response time not within the BDF response time threshold, is less than a BFD failure threshold;
after a result of the second determination is in affirmative, transmit a second BFD echo frame to the second network routing device;
receive, from the second network routing device, a second BFD response frame that corresponds to the second BFD echo frame;
determine whether a second response time associated with the second BFD response frame is less than the BFD response time threshold;
and
in response to determining that the second response time is less than the BFD response time threshold, provide, to the requesting device, a notification that a BFD session has been established between the network routing device and the second network routing device.

9 more elements

A network routing device for establishing a network fault detection session, the network routing device including a programmable hardware processor to:

receive, from a requesting device, a request to initiate a bidirectional forwarding detection (BFD) session with a second network routing device different from the requesting device;
transmit a first plurality of BFD echo frames to the second network routing device;
receive, from the second network routing device, a first plurality of BFD response frames that correspond to the first plurality of BFD echo frames;
perform a first determination to determine that response times associated with the first plurality of BFD response frames are not less than a BFD response time threshold;
in response to the first determination, perform a second determination to determine that either a time period since transmission of the first plurality of BFD echo frames or a total number of BFD echo frames with a corresponding response time not within the BDF response time threshold, is less than a BFD failure threshold;
after a result of the second determination is in affirmative, transmit a second plurality of BFD echo frames to the second network routing device;
receive, from the second network routing device, a second plurality of BFD response frames that correspond to the second plurality of BFD echo frames;
determine that second response times associated with the second plurality of BFD response frames is less than the BFD response time threshold;
and
provide, to the requesting device, a notification that a BFD session has been established between the network routing device and the second network routing device.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/659,908Filed 26 Jul 2017
Priority: IN 20164104269214 Dec 2016
Published: US 2018/0167262 A114 Jun 2018
Granted: 21 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04L 69/40
Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass: for…
H04L 41/0668
Using network fault recovery: by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
H04L 43/10
Arrangements for monitoring or testing data switching networks: active monitoring, e.g. heartbeat, ping or trace-route
H04L 43/16
Arrangements for monitoring or testing data switching networks: threshold monitoring